CN104916452B - A kind of ultracapacitor wood activated charcoal composite material and preparation method thereof - Google Patents
A kind of ultracapacitor wood activated charcoal composite material and preparation method thereof Download PDFInfo
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- CN104916452B CN104916452B CN201510192172.8A CN201510192172A CN104916452B CN 104916452 B CN104916452 B CN 104916452B CN 201510192172 A CN201510192172 A CN 201510192172A CN 104916452 B CN104916452 B CN 104916452B
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Abstract
The present invention provides a kind of ultracapacitor wood activated charcoal composite materials and preparation method thereof, first carbonize wood substance grain raw material under nitrogen protection, washing and drying after charing, low temperature drying after carbonized stock is mixed with dipping with nickel nitrate solution.Calcining makes nickel nitrate be converted to elemental nickel under an inert atmosphere.After calcining, cooling heating carries out nickel catalytic activation reaction using vapor.After the completion of activation, air is passed through in the backward activation furnace that cools down, elemental nickel is converted to the oxidation abundant postcooling of nickel reactant, milling obtains extra specific surface area and is loaded with the super capacitor active carbon of nickel oxide.The catalytic activity that nickel is utilized in the present invention is prepared with active carbon with high specific surface area, and utilizes faraday's capacity effect of nickel oxide, is obtained having high-specific surface area and is loaded with the super capacitor active carbon of nickel oxide.The recycling of nickel need not be carried out, and nickel is converted to nickel oxide and prepares super capacitor active carbon composite material.Preparation process is simple, efficient, environmental protection.
Description
Technical field
The present invention relates to a kind of ultracapacitor wood activated charcoal composite materials and preparation method thereof, and in particular to wooden
The activation of raw material nickel-loaded catalyzed aqueous vapour and oxide deposition nickel oxide prepare the simplicity of super capacitor active carbon composite material
Method.
Background technology
Ultracapacitor has the characteristics that charging rate is fast, power density is high, long lifespan, is to solve power used for electric vehicle
The most effective approach of power supply.The sole power power supply that it can both run as electric vehicle can also be used as electric vehicle operation
Auxiliary power power supply.Ultracapacitor can be additionally used in photovoltaic cell electric power storage, the stabilization of power grids, radio transmitting constant power device,
And the startup energy of tank, rocket extract；The U.S., Europe, Japan etc. are also carrying out the research of ultracapacitor.
Wood activated charcoal is a kind of very promising electrode material for super capacitor, its cost of material is low, large specific surface area,
Pore structure easy-regulating, electrochemical stability are high, so using also most extensive.At present, the mode for manufacturing super capacitor active carbon is
KOH activation methods and vapor catalytic activation method.KOH activation methods preparation process need to use the KOH of 4-6 times of material quality as work
Agent needs a large amount of water and hydrochloric acid to be eluted out KOH after priming reaction, causes three-waste pollution big, and equipment corrosion is tight
The problem of weight is the bottleneck for hindering super capacitor active carbon development.Vapor catalytic activation method is to use metal oxide (such as
TiO2, CaO), soluble-salt (such as nitrate) be catalyst, carbon-water priming reaction of catalyzed aqueous vapour and carbonized stock.Activation
After catalyst wash is sloughed with acid-base solution remove again, with deionized water rinsed clean.Cause preparation process complicated, and produce
Raw a large amount of gas-liquid pollution, limits the development of the technique.
(Jiang Qi, Zhao Xiaofeng, Huang Bin wait influence [J] the objects of activated carbons re-activation to its electrochemistry capacitance to Jiang Qi et al.
Physicochemical journal, 2009,25 (4)：757-761) the study found that the active carbon electrode material obtained using KOH re-activation methods,
Mesopore proportion increases and decreases, and specific capacitance is significantly increased, and 145F/g is increased to by original 45F/g.
(ultracapacitor of Zhu Chen, Zhang Yuanliang, Liu Hongtao oxidations-activation process is with high than electricity by Central South University Zhu Chen et al.
Hold activated carbon [J] Central South University journal：Natural science edition, 2012,43:4638-4645.) by being adopted to plain particles activated carbon
Different Optimization process is taken, is found after air pre-oxidizes, then is activated with mixed acid (phosphoric acid+sulfuric acid) or potassium hydroxide
Processing, obtains high specific capacitance activated carbon for super capacitors.The activated carbon electrodes specific capacity of air oxidation-nitration mixture activation process
For 187F/g, the activated carbon electrodes specific capacity of air oxidation-alkali activation process reaches 206F/g.
Guo-hui Yuan et al. (Guo-hui Yuan, Zhao-hua Jiang, AkikoAramata, Yun-zhi
Gao.Electrochemicalbehavior of activated-carbon capacitor material loaded
With nickel oxide [J] .Carbon, 2005,432913-2917.) by NiO2Particle supports activated carbon surface conduct
Cathode, although reducing the specific surface area of activated carbon, the capacitance of electrode increases l0.84% and (is risen to from 175.4F/g
194.1F/g), the capacitance under different current densities does not change significantly, but capacitor supports NiO2Energy after particle
Density is increased.
(HAI Yong-qiang (Hai Yongqiang), ZHANG Wen-feng (Zhang Wenfeng), the WANG Bivan (kings such as Hai Yongqiang
Green swallow), the preparation of et a1. activated carbon for super capacitors and performance [J] .Battery Bimonthly, 2006,36 (2)：92
- 94.) AC is activated with KOH, achieves good effect, the specific surface area of material is up to 2 000~3 000 m2/ g,
Specific capacitance also increases.
(preparation of the coal based activated carbon electrode materials of Zhang Chuanxiang and performance [M] the Beijing such as Zhang Chuanxiang：Coal industry is published
Society, 2009：46.) using bituminous coal as presoma, KOH is activator, using activated carbon specific surface area made from conventional heating mode
Up to 3134m2/ g, specific capacitance 281F/g,
In conclusion usually super capacitor active carbon is prepared using KOH activation methods and catalytic activation method, but a disadvantage is that
KOH corrosivity is too strong, and equipment investment is excessive, can not continuous production, and preparation process generates a large amount of gas and liquid pollution
Object.Catalytic activation is needed using a large amount of hydrochloric acid and deionized water recycling catalyst, and step is more, and pollution is big, and actual application value is not
By force.
Invention content
Seriously polluted in order to solve preparation process of the existing technology, step is more, causes product capacitive property low, cost
The problem of high, the present invention carry a kind of ultracapacitor wood activated charcoal composite material and preparation method thereof, and preparation process cleans,
Step is simple, and product capacitive property is high, and manufacture is at low cost.
The technical scheme is that：A kind of preparation method of ultracapacitor wood activated charcoal composite material, including
Following steps：
The first step, raw material prepare：By wood material charing process, carbonized material hydrochloric acid, nitric acid wash by several times, and removal is inorganic
Impurity；
Second step, Ni (NO3)2·6H2The impregnation of O：Nickel nitrate is configured to solution, is mixed with wooden carbonized material, is soaked
Stain, centrifugation drying；
Third walks, calcining：Calcining furnace will be placed in impregnated of the wooden carbonized material particle of nickel nitrate, heated up under an inert atmosphere
To calcining final temperature, heat preservation makes nickel nitrate be converted to elemental nickel；
4th step, catalytic activation：The carbonized material that deposited elemental nickel is put into activation furnace, activation final temperature is warming up to, is passed through
Vapor carries out catalytic activation；
5th step, elemental nickel oxidation：After the completion of activation, furnace temperature is down to 150-300 DEG C, air is passed through into activation furnace,
Oxidation reaction makes elemental nickel be converted to nickel oxide for a period of time, cools down, milling, obtains the super capacitor activity of load nickel oxide
Carbon composite.
Wood material described in the first step is any number of including coconut husk, walnut shell, sawdust, bamboo scraps, particle size range 1.0mm-
10.0mm。
The mass ratio of nickel nitrate solution mass concentration 5-20% in second step, wooden carbonized material and nickel nitrate for 1 ︰ (0.1~
0.5)。
Calcining is the flow velocity under inert gas shielding in third step：1L/min calcines 300-600 DEG C of final temperature, calcination time
30-120min, inert atmosphere are nitrogen or argon gas.
700-900 DEG C of catalytic activation final temperature in 4th step, soak time 30min-120min.
The flow 1-3L/min of air in 5th step, oxidation time 30-120min.
A kind of ultracapacitor is used with the ultracapacitor that the preparation method of wood activated charcoal composite material obtains
Wood activated charcoal composite material, 1500~2500m of specific surface area2/ g, specific capacitance 260-350F/g, nickel oxide deposition 5~
20%, yield 30-60%, iodine sorption value are 1200~2500mg/g.
Advantageous effect：
1. preparing super capacitor active carbon using vapor catalytic activation and nickel original position air oxidation process, preparation process relatively passes
For system using KOH activation methods, preparation process does not generate pollution, and equipment corrodes small, simple process and low cost.Convenient for industrializing implementation.
2. the air oxidation of nickel original position improves capacitive property, removes the step step of recycling catalyst from into nickel oxide.Super electricity
Hold 1500~2500m of specific surface area of activated carbon2/ g, specific capacitance 260-350F/g, nickel oxide deposition 5~20%, yield 30-
60%, iodine sorption value is 1200~2500mg/g.
Description of the drawings
The different activated carbon N for carrying nickel concentration prepared by Fig. 1 embodiments2Adsorption-desorption isothermal.W represents raw material in legend
By washing, H represents raw material through overpickling.
Fig. 2 is the different activated carbon cyclic voltammetric Tequ lines for carrying nickel concentration prepared by embodiment.
Fig. 3 is the different activated carbon charging and discharging curves (current density 1A/g) for carrying nickel concentration prepared by embodiment.
Fig. 4 is the super capacitor active carbon of area load nickel oxide prepared by embodiment.
Specific embodiment
The present invention is as follows with the test method of wood activated charcoal composite property to prepared ultracapacitor：
(1) specific surface area, the measure of pore volume：Using activated carbon under the conditions of liquid nitrogen to the measure of nitrogen adsorption isotherm,
Specific surface area is calculated according to BET formula.
(2) surface topography uses the S-4800 type cold field emission electron microscope observations of Hitachi, Japan (Hitachi) company.
(3) measure of specific capacitance：It is measured under constant current using electrochemical workstation.
A kind of ultracapacitor wood activated charcoal composite material and preparation method thereof, includes the following steps：
The first step, raw material prepare：Wood material is carbonized into 60min at 500 DEG C, carbonized material hydrochloric acid, nitric acid are washed by several times
It washs, removes inorganic impurity.
Second step, nickel nitrate (Ni (NO3)2·6H2O impregnation)：Nickel nitrate is configured to solution, with wooden charing
Material mixing, impregnates 24 hours or more, centrifugation drying.Nickel nitrate solution mass concentration is 5-20%, wooden carbonized material and nickel nitrate
Mass ratio for 1 ︰ (0.1~0.5), after the completion of dipping, centrifugation removal filtrate is dried to moisture at 150 DEG C and is evaporated so that nitric acid
Nickel is sufficiently impregnated, into material, preventing high temperature from reuniting.
Third walks, calcining：Calcining furnace will be placed in impregnated of the wooden carbonized material particle of nickel nitrate, heated up under an inert atmosphere
To calcining final temperature, nickel nitrate is converted to elemental nickel by held for some time.Inert gas includes nitrogen, argon gas, flow velocity： 1L/
Min, 300-600 DEG C of calcination temperature, calcination time 30min-120min.
4th step, catalytic activation：The carbonized material that deposited elemental nickel is put into activation furnace, is warming up to certain heating rate
Final temperature is activated, the vapor for being passed through certain flow carries out catalytic activation, activates 700-900 DEG C of final temperature, soak time 30min-
120min。
5th step, elemental nickel oxidation：After the completion of activation, furnace temperature is down to 150-300 DEG C, a constant current is passed through into activation furnace
Elemental nickel is converted to nickel oxide, keeps 30-120min, cooled down by the air of amount, and it is super to obtain load nickel oxide etc. for milling
Capacitance absorbent charcoal composite material.1500~2500m of specific surface area of super capacitor active carbon2/ g, specific capacitance 260-350F/g,
Nickel oxide deposition 5~20%, yield 30-60%, iodine sorption value are 1200~2500mg/g.
The wood material used in the method for the present invention may include the air-dry samples such as coconut husk, almond, sawdust.Nickel nitrate solution
Nickel nitrate (Ni (NO may be used in preparation3)2·6H2O aqueous solution), mass percent are 5%~20% ratio.Carbo lignius
1 ︰ (0.1~0.5), the calcination temperature of wooden carbonized material and nickel nitrate mixed material can be used in the mass ratio of material and pure nickel nitrate
Range is at 300-600 DEG C, calcination time 30-120min, until nickel nitrate is fully converted to elemental nickel.The charcoal of elemental nickel will be deposited
Material is put into activation furnace, and the vapor for being passed through certain flow carries out catalytic activation, activates 700-900 DEG C of final temperature, soak time
30min-120min.After the completion of activation, furnace temperature is down to 150-300 DEG C, the air of certain flow is passed through into activation furnace, it will be single
Matter nickel is converted to nickel oxide, keeps 30-120min, cools down, milling, and it is compound to obtain the super capacitor active carbons such as load nickel oxide
Material.
The ultracapacitor of the present invention capacitance of wood activated charcoal composite material, specific surface area, pore-size distribution, pore volume
It can be controlled by nickel loading, activation temperature, soak time during steam activation.Wooden super capacitor active carbon system
It is standby：First wood material is carbonized, is dried after pickling ash disposal.Again by the carbonized material nitric acid with certain mass concentration according to a certain percentage
Nickel solution mixes, after being sufficiently impregnated, through low temperature drying.Mixed material is placed in calcining furnace, is warming up to calcining under an inert atmosphere
Nickel nitrate is converted to elemental nickel by temperature, held for some time.After calcining, cooling takes out carbonized material, is put into activation furnace
In, activation temperature is warming up to, then be passed through vapor and carry out nickel catalytic activation reaction.After the completion of activation, furnace temperature is down to a constant temperature
Degree is passed through the air of certain flow into activation furnace, and elemental nickel is converted to nickel oxide, keeps after a certain period of time, cooling down, mill
Powder obtains extra specific surface area and is loaded with the super capacitor active carbon of nickel oxide.The mass ratio of wooden carbonized material and nickel nitrate is
1 ︰ (0.1~0.5), inert gas flow velocity：1L/min, 300-600 DEG C of calcination temperature, calcination time 30min-120min.Water steams
700-900 DEG C of gas catalytic activation temperature, soak time 30min-120min.Elemental nickel is converted to nickel oxide through air oxidation,
150-300 DEG C of oxidizing temperature is maintained, keeps 30-120min.
Embodiment 1
(1) raw material carbonizes：Coconut husk raw material is carbonized into 60min at 500 DEG C and obtains carbonized material, with the hydrochloric acid of 1M/L, nitric acid
Solution washs by several times, removes inorganic impurity.
(2) nickel nitrate (Ni (NO3)2·6H2O impregnation)：The nickel nitrate solution that mass concentration is 5% is configured to, is pressed
According to the ratio of 1 ︰ 0.1 of mass ratio, wooden carbonized material with nickel nitrate solution is mixed, is impregnated 24 hours, in 150 DEG C of bakings after centrifugation
It is dry.
(3) it calcines：Calcining furnace will be placed in impregnated of the wooden carbonized material particle of nickel nitrate, be warming up to forges under nitrogen protection
300 DEG C of final temperature is burnt, 60min is kept the temperature, nickel nitrate is converted to elemental nickel.
(4) catalytic activation：The carbonized material that deposited elemental nickel is put into activation furnace, 700 DEG C of final temperature of activation is warming up to, is passed through
Vapor carries out catalytic activation, soak time 30min.
(5) elemental nickel aoxidizes：After the completion of activation, furnace temperature is down to 150 DEG C, the sky of 5L/min flows is passed through into activation furnace
Gas keeps 60min, after elemental nickel is converted to nickel oxide, cool down, milling, obtain the super capacitors activity such as load nickel oxide
Carbon composite.The specific surface area 1500m2/g of super capacitor active carbon, specific capacitance 260F/g, nickel oxide deposition 5%, yield
30%, iodine sorption value 1200mg/g.
Embodiment 2
(1) raw material carbonizes：Coconut husk raw material is carbonized into 60min at 500 DEG C and obtains carbonized material, with the hydrochloric acid of 1M/L, nitric acid
Solution washs by several times, removes inorganic impurity.
(2) nickel nitrate (Ni (NO3)2·6H2O impregnation)：The nickel nitrate solution that mass concentration is 20% is configured to,
According to the ratio of 1 ︰ 0.5 of mass ratio, wooden carbonized material with nickel nitrate solution is mixed, is impregnated 24 hours, in 150 DEG C of bakings after centrifugation
It is dry.
(3) it calcines：Calcining furnace will be placed in impregnated of the wooden carbonized material particle of nickel nitrate, be warming up to forges under nitrogen protection
600 DEG C of final temperature is burnt, 120min is kept the temperature, nickel nitrate is converted to elemental nickel.
(4) catalytic activation：The carbonized material that deposited elemental nickel is put into activation furnace, 900 DEG C of final temperature of activation is warming up to, is passed through
Vapor carries out catalytic activation, soak time 120min.
(5) elemental nickel aoxidizes：After the completion of activation, furnace temperature is down to 150 DEG C, the sky of 5L/min flows is passed through into activation furnace
Gas keeps 60min, after elemental nickel is converted to nickel oxide, cool down, milling, obtain the super capacitors activity such as load nickel oxide
Carbon composite.The specific surface area 2100m of super capacitor active carbon2/ g, specific capacitance 280F/g, nickel oxide deposition 21% obtain
Rate 17%, iodine sorption value 920mg/g.
Embodiment 3
(1) raw material carbonizes：Coconut husk raw material is carbonized into 60min at 500 DEG C and obtains carbonized material, with the hydrochloric acid of 1M/L, nitric acid
Solution washs by several times, removes inorganic impurity.
(2) nickel nitrate (Ni (NO3)2·6H2O impregnation)：The nickel nitrate solution that mass concentration is 10% is configured to,
According to the ratio of 1 ︰ 0.3 of mass ratio, wooden carbonized material with nickel nitrate solution is mixed, is impregnated 24 hours, in 150 DEG C of bakings after centrifugation
It is dry.
(3) it calcines：Calcining furnace will be placed in impregnated of the wooden carbonized material particle of nickel nitrate, be warming up to forges under nitrogen protection
500 DEG C of final temperature is burnt, 60min is kept the temperature, nickel nitrate is converted to elemental nickel.
(4) catalytic activation：The carbonized material that deposited elemental nickel is put into activation furnace, 850 DEG C of final temperature of activation is warming up to, is passed through
Vapor carries out catalytic activation, soak time 45min.
(5) elemental nickel aoxidizes：After the completion of activation, furnace temperature is down to 200 DEG C, the sky of 5L/min flows is passed through into activation furnace
Gas keeps 30min, after elemental nickel is converted to nickel oxide, cool down, milling, obtain the super capacitors activity such as load nickel oxide
Carbon composite.The specific surface area 2500m of super capacitor active carbon2/ g, specific capacitance 320F/g, nickel oxide deposition 20% obtain
Rate 30%, iodine sorption value 2490mg/g.
Embodiment 4
(1) raw material carbonizes：Coconut husk raw material is carbonized into 60min at 500 DEG C and obtains carbonized material, with the hydrochloric acid of 1M/L, nitric acid
Solution washs by several times, removes inorganic impurity.
(2) nickel nitrate (Ni (NO3)2·6H2O impregnation)：The nickel nitrate solution that mass concentration is 10% is configured to,
According to the ratio of 1 ︰ 0.3 of mass ratio, wooden carbonized material with nickel nitrate solution is mixed, is impregnated 24 hours, in 150 DEG C of bakings after centrifugation
It is dry.
(3) it calcines：Calcining furnace will be placed in impregnated of the wooden carbonized material particle of nickel nitrate, be warming up to forges under nitrogen protection
400 DEG C of final temperature is burnt, 60min is kept the temperature, nickel nitrate is converted to elemental nickel.
(4) catalytic activation：The carbonized material that deposited elemental nickel is put into activation furnace, 800 DEG C of final temperature of activation is warming up to, is passed through
Vapor carries out catalytic activation, soak time 45min.
(5) elemental nickel aoxidizes：After the completion of activation, furnace temperature is down to 300 DEG C, the sky of 5L/min flows is passed through into activation furnace
Gas keeps 120min, after elemental nickel is converted to nickel oxide, cool down, milling, obtain the super capacitors activity such as load nickel oxide
Carbon composite.The specific surface area 1940m of super capacitor active carbon2/ g, specific capacitance 297F/g, nickel oxide deposition 10% obtain
Rate 17%, iodine sorption value 1790mg/g.
Embodiment 5
(1) raw material carbonizes：Coconut husk raw material is carbonized into 60min at 500 DEG C and obtains carbonized material, with the hydrochloric acid of 1M/L, nitric acid
Solution washs by several times, removes inorganic impurity.
(2) nickel nitrate (Ni (NO3)2·6H2O impregnation)：The nickel nitrate solution that mass concentration is 10% is configured to,
According to the ratio of 1 ︰ 0.3 of mass ratio, wooden carbonized material with nickel nitrate solution is mixed, is impregnated 24 hours, in 150 DEG C of bakings after centrifugation
It is dry.
(3) it calcines：Calcining furnace will be placed in impregnated of the wooden carbonized material particle of nickel nitrate, be warming up to forges under nitrogen protection
300 DEG C of final temperature is burnt, 60min is kept the temperature, nickel nitrate is converted to elemental nickel.
(4) catalytic activation：The carbonized material that deposited elemental nickel is put into activation furnace, 850 DEG C of final temperature of activation is warming up to, is passed through
Vapor carries out catalytic activation, soak time 60min.
(5) elemental nickel aoxidizes：After the completion of activation, furnace temperature is down to 200 DEG C, the sky of 5L/min flows is passed through into activation furnace
Gas keeps 60min, after elemental nickel is converted to nickel oxide, cool down, milling, obtain the super capacitors activity such as load nickel oxide
Carbon composite.The specific surface area 2380m of super capacitor active carbon2/ g, specific capacitance 310F/g, nickel oxide deposition 17% obtain
Rate 22%, iodine sorption value 2150mg/g.
Embodiment 6
Coconut husk raw material in embodiment 3 is changed to almond, remaining obtains the specific surface area of activated carbon sample with embodiment 3
1980m2/ g, specific capacitance 305F/g, nickel oxide deposition 22%, yield 23%, iodine sorption value 2050mg/g.
Embodiment 7
Coconut husk raw material in embodiment 3 is changed to sawdust, remaining obtains the specific surface area of activated carbon sample with embodiment 3
1960m2/ g, specific capacitance 317F/g, nickel oxide deposition 18%, yield 21%, iodine sorption value 2120mg/g.
Nickel oxide faraday capacity effect, while prepared by high-ratio surface to steam activation as can be seen from the above embodiments
Activated carbon has catalytic action, has significantly affected capacitance, and nickel oxide answers load capacity 20% to the best of capacitance raising in example
Activation temperature and soak time influence activated carbon specific surface area and pore-size distribution, 850 DEG C of activation temperature in example, soak time
45min obtains maximum specific surface area.
Claims (7)
1. a kind of ultracapacitor preparation method of wood activated charcoal composite material, which is characterized in that include the following steps：
The first step, raw material prepare：Wood material charing process is obtained into wooden carbonized material, wooden carbonized material hydrochloric acid, nitric acid point
Secondary washing removes inorganic impurity；
Second step, Ni (NO3)2·6H2The impregnation of O：By Ni (NO3)2·6H2O is configured to solution, is mixed with wooden carbonized material
It closes, dipping, centrifugation drying；
Third walks, calcining：It will be impregnated of Ni (NO3)2·6H2The wooden carbonized material particle of O is placed in calcining furnace, under an inert atmosphere
Calcining final temperature is warming up to, heat preservation makes Ni (NO3)2·6H2O is converted to elemental nickel；
4th step, catalytic activation：The wooden carbonized material that deposited elemental nickel is put into activation furnace, activation final temperature is warming up to, is passed through
Vapor carries out catalytic activation；
5th step, elemental nickel oxidation：After the completion of activation, furnace temperature is down to 150-300 DEG C, air is passed through into activation furnace, is aoxidized
Reaction a period of time makes elemental nickel be converted to nickel oxide, cools down, milling, and the super capacitor active carbon for obtaining load nickel oxide is answered
Condensation material.
2. a kind of preparation method of ultracapacitor wood activated charcoal composite material as described in claim 1, feature exist
In the wood material described in the first step is any including coconut husk, walnut shell, sawdust, bamboo scraps, particle size range 1.0mm-10.0mm.
3. a kind of preparation method of ultracapacitor wood activated charcoal composite material as described in claim 1, feature exist
In Ni (NO in second step3)2·6H2O concentration of polymer solution 5-20%, wooden carbonized material and Ni (NO3)2·6H2The mass ratio of O is
1 ︰（0.1~0.5）.
4. a kind of preparation method of ultracapacitor wood activated charcoal composite material as described in claim 1, feature exist
In calcining is the flow velocity under inert atmosphere protection in third step：1L/min calcines 300-600 DEG C of final temperature, calcination time 30-
120min, inert atmosphere are nitrogen or argon gas.
5. a kind of preparation method of ultracapacitor wood activated charcoal composite material as described in claim 1, feature exist
In, 700-900 DEG C of catalytic activation final temperature in the 4th step, soak time 30min-120min.
6. a kind of preparation method of ultracapacitor wood activated charcoal composite material as described in claim 1, feature exist
In the flow 1-3L/min of air, oxidation time 30-120min in the 5th step.
7. a kind of any ultracapacitor of claim 1 ~ 6 is obtained with the preparation method of wood activated charcoal composite material
Ultracapacitor wood activated charcoal composite material, which is characterized in that 1500~2500m of specific surface area2/ g, specific capacitance 260-
350F/g, nickel oxide deposition 5~20%, yield 30-60%, iodine sorption value are 1200~2500mg/g.
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| CN111943193A (en) * | 2020-08-24 | 2020-11-17 | 太原理工大学 | Preparation method of carbon material for supercapacitor, carbon material and application thereof |
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